Step 1: Convert
, which is in radians into degrees. To convert it multiply by 

900/12
75
Step 2: 75 degrees isn't on the unit circle but 45 degrees and 30 degrees is. Since 45 + 30 = 75 you can use the cosine of 45 and 30 to find the exact value
cos45 = 
cos30 =
Step 3: Add the cos45 and cos30 to get cos5pi/12

Hope this helped!
Answer:
Go talk to her
Step-by-step explanation:
Talk to her and tell her how you feel about her
4608−42=12000
4566≠12000
False
Answer:
The answer is B. 9375
Step-by-step explanation:
If you multiply 75*50 you get 3,750. Then if you multiply 9,385*2.50, you get 9,375.
Answer:5 + /- sqrt35
Step-by-step explanation:
Rearranging, we get x^2 -10x -10=0
Applying the quadratic formula,
(10 +/- sqrt(10^2 -4*-10))/2
(10+/- 2sqrt35) /2 = 5 + /- sqrt35 as the two roots.